Question
Which one of the following is TRUE about the interior gateway routing protocols - Routing Information Protocol (RIP) and Open Shortest Path First (OSPF)?
Official answer and solution
- Official answer
- A
- From
- Official GATE 2014 answer key
Solution
Identify the routing algorithms that form the foundation of RIP and OSPF interior gateway protocols.
-
Routing Information Protocol (RIP):
- An interior gateway protocol (IGP) based on the distance-vector routing algorithm (Bellman-Ford algorithm).
- Uses hop count as the routing metric (maximum hop limit 15).
-
Open Shortest Path First (OSPF):
- An interior gateway protocol (IGP) based on the link-state routing algorithm (Dijkstra's shortest path algorithm).
- Routers flood link-state advertisements (LSAs) and build a complete topology map of the area.
-
Conclusion:
RIP uses distance vector routing and OSPF uses link state routing, making option (A) TRUE.
Final answer
A
Common trap
Confusing RIP (distance vector) with OSPF (link state) or BGP (path vector).
The answer is the one in the official GATE answer key. The solution is this site's own explanation.
Source
- Paper
- GATE 2014 Computer Science and Information Technology (CS) Session 2
- Question
- 33 of 65, printed as CS Q.23
- Section
- Computer Science and Information Technology
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